How Many People Are Named Sumiko Brown?

There are approximately 1 people named Sumiko Brown living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.

This estimate combines SSA birth records for the first name Sumiko with Census Bureau frequency data for the surname Brown. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.

Estimated People with This Name

1 in 342,754,338 Americans

Combination Rarity

Very Rare

Very Rare Very Common

First Name

Sumiko

Last Name

Brown

Est. Bearers 1,589,457

Census Rank #4

Per 100K 463.73

Rarity Very Common

Sumiko: Popularity Over Time

Year-by-year SSA birth registrations for the first name Sumiko. The peak year was 1927 with 39 births. The average person named Sumiko today is 50 years old.

Ancestry of the First Name Sumiko

These percentages describe the people who had the first name Sumiko in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.

Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Sumiko rose or fell over time.

White

2.73%

Black

5.16%

Hispanic

3.74%

Asian/Pacific Islander

79.58%

American Indian/Alaska Native

0.30%

Two or More Races

8.49%

Ancestry of the Brown Surname

The surname Brown was most commonly recorded among people who identified as White in the 2020 Census.

This is a self-reported race and ethnicity breakdown for people who had the surname Brown in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.

White

55.43%

Black

34.68%

Hispanic

3.55%

Asian/Pacific Islander

0.66%

American Indian/Alaska Native

0.85%

Two or More Races

4.83%

How we calculated this

The first name "Sumiko" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.

The surname "Brown" appears at a rate of 463.73 per 100,000 people in the 2020 U.S. Census.

We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Sumiko are likely to be alive now.

Multiplying these frequencies against the U.S. population of ~343 million gives 1 estimated people. This assumes first names and last names are statistically independent. Full methodology.

Other people named Sumiko

Sumiko Johnson Sumiko Smith Sumiko Garcia Sumiko Jones Sumiko Williams

Other people with the surname Brown

Michael Brown James Brown John Brown David Brown Robert Brown William Brown Christopher Brown Joseph Brown

Sumiko Brown: Questions and Answers

How many people are named Sumiko Brown?

We estimate approximately 1 people named Sumiko Brown are alive in the United States today. The first name Sumiko is shared by 130 Americans, and the surname Brown is shared by 1,589,457.

How rare is the name Sumiko Brown?

This name combination is classified as Very Rare, occurring at a rate of about 1 in 342,754,338 Americans. The first name Sumiko is very rare and the surname Brown is very common.

Is Sumiko a male or female name?

Sumiko is predominantly female, with 0.0% of bearers being male and 100.0% female. It peaked in popularity in 1927 and the average bearer today is 50 years old.

What does the Census say about the first name Sumiko?

In the 2020 Census, the first name Sumiko was most commonly recorded among people who identified as Asian and Pacific Islander (79.58%). The next largest recorded groups were Two or More Races (8.49%) and Black (5.16%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.

Where does this data come from?

First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.

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